On Tuesday the 1st of July we were lucky enough to have Stan Swan come into our classroom to show us how to make solar powered torches out of a garden lamp and card. They can also double up as a battery recharger too.
Stan gave us a short talk on energy to begin with, which was very interesting. I learnt that most of the energy in a light bulb is used up by heat and not light. It wastes 90% of its energy on heat! That is amazing! Stan also spoke to us about how amazing the sun was. Every form of energy traces back to the sun. For example we get energy from food that has been grown by the sun.
To begin with we dismantled the lamps and had to cut some of the plastic to make it small enough and portable. We had to be careful not to chop any of the wires.
After this we sanded the sharp edges to make them smooth and began to make the box to hold and protect the solar panel and wiring.
Stan drilled us a hole in the torch so we could poke through the LED (Light Emitting Diode).
The final step was to put the torches inside the box and make them look great.
What a great afternoon!
8 comments:
It was a lot of fun doing this and I found out a lot of stuff. It made me think.
Megan
I learned heaps of new things. It was fun.
Robbie
Making the torches was a lot of work but fun. I am looking forward to using it.
Janna
It was fun making the torches. Lots of hard work too. I learnt new facts like (0% of a light bulbs energy is used up on heat.
Samantha
Making the torches was a great experience. Stan was full of interesting information. thank you Stan.
Ella
Stan showed us some really cool experiments. I liked it when he used the crank to get energy into the battery and get the big sparks.
Alexander
It was a good experience working with someone different. Stan did a lot of science work.
Thomas
It was a lot of fun doing this! i look foward to using them. Thanks heaps Stan!
Elise
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